Correct Answer: C

Rationale: Rationale for Correct Answer (C): A complete blood count (CBC) is used to identify abnormalities in red blood cells, white blood cells, and platelets. Hematocrit (HCT) and hemoglobin (Hb) levels are part of a CBC and indicate the oxygen-carrying capacity of the blood. Abnormally low HCT and Hb levels can signify conditions like anemia, which can impact a client's ability to undergo surgery due to potential complications related to oxygen delivery. Summary of Incorrect Choices: A: Potential hepatic dysfunction is not directly related to a CBC, and BUN/creatinine levels are markers for kidney function, not liver function. B: Low levels of urine constituents are not assessed in a CBC, which focuses on blood components. D: Electrolyte imbalance is not specifically tested in a CBC; it is usually evaluated through separate blood tests. Coagulation factors are not directly measured in a CBC.

Correct Answer: C

Rationale: The correct answer is C: Halos around lights. This symptom is specific to acute angle-closure glaucoma due to increased intraocular pressure causing corneal edema. Halos around lights are caused by light diffraction through edematous cornea. Flashing lights and lens opacity are not typically associated with acute angle-closure glaucoma. Flashing lights may be seen in retinal detachment, while lens opacity is more commonly seen in cataracts.

Correct Answer: D

Rationale: Step 1: Multiple sclerosis (MS) is characterized by damage to the myelin sheath, not a build-up of myelin. Step 2: MS affects the nerves, not neurotransmitters related to muscle contraction (eliminates choice B). Step 3: MS does not damage receptor sites on muscles but affects nerve signal transmission (eliminates choice C). Step 4: The correct answer, D, explains that MS damages the insulation on nerve cells (myelin sheath), leading to slower nerve impulses to the muscles, causing weakness and coordination issues.

Correct Answer: A

Rationale: The correct answer is A, assessment skills. Assessing the client's current condition, including respiratory status, is crucial in determining priorities for care in asthma management. By utilizing assessment skills, the nurse can gather essential information to identify the client's immediate needs and develop an individualized care plan. Nursing books (B) can provide general information but do not provide real-time data on the client's current status. Client's records (C) may contain historical information but may not reflect the client's current condition. Supervisor's advice (D) is important but should supplement rather than replace the nurse's assessment skills in determining immediate care priorities.

Correct Answer: A

Rationale: The correct answer is A: Completes a comprehensive database. During the first phase of the nursing process (assessment), the nurse collects data to establish a comprehensive database of the patient's health status. This information serves as the foundation for identifying nursing diagnoses, planning interventions, and evaluating outcomes. Identifying nursing diagnoses (B) occurs in the second phase (diagnosis), intervening based on priorities (C) in the third phase (planning), and determining outcomes achieved (D) in the fourth phase (evaluation). Completing a comprehensive database is crucial in the initial assessment phase to gather accurate information for the subsequent steps in the nursing process.